Improvement in molds for clay and cement pipes



SHARPE.

Molds for Clay and Cement Pipes, N0.140,734.

Patented July 8,1873;

AM. PHOTO -LITHDGRAPHIC 00. IV. Kfasaanusls Pmicsss) 'rnr OFFICE.

JOSEPH SHARPE, OF PATERSON, NEW JERSEY.

Specification forming part of Letters Patent No. 140,734, dated July 8,1873; application filed- March 15,1873.

To all whom it may concern:

Be it known that I, Josnrn SHARPE, of Paterson, in the county of Passaicand State of New Jersey, have invented an Improved Mold for FormingPipes and Tubes for Drains, Flues, and other purposes, of which thefollowing is a specification:

Figure 1 is a horizontal section of my improved mold for forming pipesand tubes; Fig. 2, a sectional elevation of the same taken on the line 0c, Fig. 1.; and Fig. 3, asectional elevation of the same, showing itadapted to the making of a branched pipe.

Similar letters of reference indicate corresponding parts.

The object of this invention is to economize room and mechanism inmaking pipes and tubes for drains and flues and other purposes, havingenlargedor other shaped ends, and to permit of the use of the molds in aportable form. Heretofore pipes of the description alluded to wereformed in molds in combination with cores and core-sockets, the corespassing through the core-sockets when being'dis charged from the pipes.There were also molds in use whose cores were enlarged at the lower endsto form the bottoms to the molds, such ends requiring to be centered bytheinner surface of the mold-cases, and each core and each moldrequiring to be held by special supports. Such supports had to be mademovable, so that after the pipes had been formed the cores could beforced down into a well or lower receptacle, after which the mold-oaseshad to be removed from the platforms or supports, in order to allow thefinal removal of the pipes from the mold-cases. The providing'of suchplatforms or supports, and of such wells or lower receptacles in themolding machinery, greatly enhances the size and expense thereof. Iattempt to so construct the mold that it can be set stationary orremoved from place to place, or operated along the line of the ditch,trench, or wherever such pipe is to be laid. I will thereby be enabledto dispense with cranes or other separate mechanical devices forremoving the cores from the pipes when completed, and also to dispensewith the use of special receptacles, platforms, or supports for theseveral parts during the process of making the pipes.

My invention consists in providing the core with a central or nearlycentral screw, running through the entire length of the core, andextending into the bottom and'so operating that when it is turned itwill force the core upward out of the pipe without turning the core,while during the process of forming the pipe it serves to firmly connectthe core and bottom. Finally, my invention consists in the use ofasimilar screw extending through a branch core into the main core-thatisto say, it holds the branch core firmly in place during the process offorming the pipe, and it facilitates the withdrawal of such branch coreafter the pipe has been completed.

In the accompanying drawing, the letter A represents the outer mold caseor shell, made in two or more parts, which are connected by suitableclips at, in the customary or ordinary manner. B is the core of a moldplaced within the shell A and upon the bottom (3, which bottom extendsunder the shell A, and also under the core, as clearly shown in Fig. 2,to support both of these parts in their proper position. By means ofslips 1), set-screws, or otherwise, the bottom 0 may be connected withthe lower end of the shell A, so that it can be attached or removed whendesired. D is a screw extending through the center of the core B intothe bottom 0 of a mold-case. It serves to hold the core connected withthe bottom,and also to allow the elevation of the core out of the mold.When the parts are connected in the manner indicated in Fig. 2, the moldis ready for the reception of a charge, and after having been filled,the screw 1) is turned to raise the core out of the pipe. When the corehas been so far raised that the screw will no longer be connected withthe bottom of the mold it will be easy to lift the core entirely out ofthe pipe. The mold-shell and contents may then be removed to any desiredplace, the shell taken from the pipe, or it may remain where first made,taken from the pipe and put together in another place, as may bedesired. In removing the mold-case from the pipe several methods may beemployed. I may raise the case and contents a few inches from the groundor other support, detach the bottom, remove it from under the mold, thenset down the mold with its contents and take the shell A apart; or Imay, after the core has been withdrawn, reverse the mold-case, with itscontents, turn it bottom upward, and then open the shell and retain thepipe clear of encumbrances. In some cases I may not find it necessary touse the screw D for forcing the core B out of the pipe, and may thenconnect the core rigidly with the bottom 0. Then for removing the pipe,the mold-shell would first be disengaged from the bottom and removed,with its contents, and opened apart, admitting, therefore, the readyremoval of the pipe after the core has been forced out. In this case myinvention would still consist in having the bottom 0 of the mold-casesupporting and connecting with the core B. E in the drawing representsabranch core placed at any angle to and against the core B, andextending outward through a tubular projection, F, of the shell A. Thisbranch core is employed whenever a branched pipe is to be -made. Whenused I prefer to combine with it a screw, G, which extends through thebranch core E into the core B, as already shown in Fig. 3, and by meansof which, after the pipe has been completed, the branch core can bereadily drawn out from the branched part of the pipe far enough tofacilitate its removal.

What is here claimed, and desired to be secured by Letters Patent, is-

1. The screw D, fitted through a core, B, to connect the same with themold-bottom O and allow its elevation out of the pipe, as described.

2. The bran ch-core E, provided with a screw, G, by which it isconnected with the main core B, substantially as and for the purposespecified.

' JOSEPH SHARPE.

Witnesses:

JACOB V. ACKERMAN, GEORGE E. Low.

